<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>HTML5定位</title>
    <script type="text/javascript" src="http://lib.sinaapp.com/js/jquery/1.7.2/jquery.min.js"></script>
  <script type="text/javascript" src="http://api.map.baidu.com/api?v=2.0&ak=wqBXfIN3HkpM1AHKWujjCdsi"></script>
  <script type="text/javascript" src="http://developer.baidu.com/map/jsdemo/demo/convertor.js"></script>
    <style type="text/css">
    *{ margin: 0px; padding: 0px;}
  body{text-align: center;  height: 100%;overflow:hidden;}
  #allmap{ width: 100%;height: 100%; position: absolute;}
    </style>
</head>
<body>
    <div id="allmap"></div>
<script type="text/javascript">
 $(function(){
     if(supportsGeoLocation()){
         alert("你的浏览器支持 GeoLocation.");
     }else{
         alert("不支持 GeoLocation.")
     }
     // 检测浏览器是否支持HTML5
     function supportsGeoLocation(){
        return !!navigator.geolocation;
     }
     // 单次位置请求执行的函数
     function getLocation(){
        navigator.geolocation.getCurrentPosition(mapIt,locationError);
     }
     //定位成功时，执行的函数
     function mapIt(position){
        var lon = position.coords.longitude;
        var lat = position.coords.latitude;
           // alert("您位置的经度是："+lon+" 纬度是："+lat);
        var map = new BMap.Map("allmap");
        var point = new BMap.Point(""+lon+"",""+lat+"");
        map.centerAndZoom(point,19);
        var gc = new BMap.Geocoder();
        translateCallback = function (point){
            var marker = new BMap.Marker(point);
            map.addOverlay(marker);
            map.setCenter(point);
            gc.getLocation(point, function(rs){
                  var addComp = rs.addressComponents;
                  if(addComp.province!==addComp.city){
                    var sContent =
                    "<div><h4 style='margin:0 0 5px 0;padding:0.2em 0'>你当前的位置是：</h4>" +
                    "<p style='margin:0;line-height:1.5;font-size:13px;text-indent:2em'>"+addComp.province + ", " + addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber+"</p>" +
                    "</div>";}
                  else{
                    var sContent =
                    "<div><h4 style='margin:0 0 5px 0;padding:0.2em 0'>你当前的位置是：</h4>" +
                    "<p style='margin:0;line-height:1.5;font-size:13px;text-indent:2em'>"+ addComp.city + ", " + addComp.district + ", " + addComp.street + ", " + addComp.streetNumber+"</p>" +
                    "</div>";
                  }
                  var infoWindow = new BMap.InfoWindow(sContent);
                  map.openInfoWindow(infoWindow,point);
            });
        }
        BMap.Convertor.translate(point,0,translateCallback);
    }
  // 定位失败时，执行的函数
  function locationError(error){
      switch(error.code){
        case error.PERMISSION_DENIED:
          alert("User denied the request for Geolocation.");
          break;
        case error.POSITION_UNAVAILABLE:
           alert("Location information is unavailable.");
          break;
        case error.TIMEOUT:
           alert("The request to get user location timed out.");
          break;
        case error.UNKNOWN_ERROR:
           alert("An unknown error occurred.");
          break;
      }
  }
  // 页面加载时执行getLocation函数
  window.onload = getLocation;
})
</script>
</body>
</html>
